双线并绕螺线管引入霍尔效应测量螺线管磁场的实验改进

Introduction of Bifilar Wound Solenoid to Improve the Measurement of Hall Effect Experiment

针对大学物理实验中霍尔效应测量螺线管磁场实验中同一螺线管所通入电流既作为已知电流求霍尔元件的灵敏度又作为未知电流求螺线管的磁场这一不足,提出一种设计方法,采用双线并绕螺线管使两个电流进行有效区分,同时还可以测量螺线管内的叠加磁场,可使学生深刻全面理解霍尔效应测量螺线管磁场的原理及螺线管磁场的性质,并可作为设计性实验项目培养学生的创新意识。

In the Hall-Effect experiment of college physics, the electric current along the solenoid coil is used to measure the sensitivity of Hall devices and to produce the magnetic field in the solenoid coil as unknown current.To overcome this shortage,we proposed a designing way to adopt two wires twined along the solenoid coil side by side to satisfy the different requirements.At the same time,we can also measure the total magnetic field in the solenoid coil.This will help the students to comprehensively understand the underlying mechanisms of Hall-Effect measurements by the solenoid coiland the properties of magnetic field in the solenoid coil, and to inspire the innovation ability of students to desire the novel experiments.